118 



unserer Leser, der das obige Bulletin nicht besltzt, will- 

 kommen sein werden. 



Staurastrum iotomum nov. spec. 



Very minute; semicells quadrangular, angles drawn out 

 into thin, diverging, granular rays, each about as long as 

 the diameter of the body, apices obtuse; end view trira- 

 diate. Diameter, including the rays, 15 — 20 /*. 



A small species; quite plentiful at Ocean Beach and at 

 Malaga, N. J. 



Staurastrum leptacanthum, var. Tetroclocc- 

 rum, n. var. 



iSemicclls suborbicular furnished with eight, long, thin 

 rays, deeply forked, or clawed at the ends; this whorl 

 rather below the middle, and another above it with four 

 similar rays; end view octangular, each angle produced inli) 

 a long thin ray; between the margin and the centre are 

 four more rays. Membrane smooth. Diameter of body 25 /< ; 

 including the rays 75 — 80 f^. 



The only essential distinction between this form and 

 the typical Brazilian plant is that ours has eight and four 

 rays in the two whorls, and the Brazilian plant has six and 

 four rays. 



Collected in pond near Malaga, N. J. 



S. Quaternium, n. sp. 



Small, smooth, quadrangular in front view, deeply con- 

 stricted; sinus acute angled, much ampliated; semicells ob- 

 long, sides rounded, end truncate, each angle furnished with 

 four firm aculei; end view triangular, sides concave, angh^s 

 broadly rounded and furnished with four aculei. DiamettM- 

 25 fi] with aculei 40 — 50^^. 



Ponds, Malaga, N. J., and Wilkesbarre, Penn. 



S. Ankyroides, n. sp. , 



About as long as wide, granularly rough; semicollB 

 cylindrical , with enlargement towards the convex ends ; 

 sides produced into narrow, elongate, slightly tapering, in- 

 curved arms; margins granulate crenate, apices bifurcate; 

 end view quadrangular, with angles drawn out into long 

 arms. Diameter 82 /*, Length 74 /i. 



The only water which hitherto furnished this new sj)o- 

 cies was a pond near Malaga, N. J. Var. Hexacerum, 

 n. var. Somewhat stouter than the typical form and fur- 

 nished with six, instead of four arms. 



This variety I find in northern counties of New Jersey. 

 In the possession of six arms it bears a resemblance to St, 

 coronulatum, but, being nearly twice the lengthy and 



